Nonrotary self-opening die head



April 21, 1931. E. A. BARTEIT NONROTARY SELF OPENING DIE HEAD Filed May 18 19128 3 Sheets-Sheet 1 April 21, 1931. E. A. BARTEIT 1,802,103

NONROTARY SELF OPENING DIE HEAD Filed May 18 192 3 Sheets-Sheet 2 A ril 21, 1.931.- E. A. BARTEIT NONROTARY SELF OPENING DIE HEAD Filed May 18 1928 3 Sheefis-Sheet 3 w :K 3 1| 3 z 0 w 5 Z Y I m 3 V Z z J H w 53 i. W

a za 1%////////// H Patented ApnZl, 1931 are, sears resales r Fries EWALD A. BAR-TEI T, OE NEW' HEAVEN, CONNECTICUT, ASSIGN OB TO THE GEOMETRIC I I TOOL 00., OF NEW HAVEN} CONNECTICUT, A CQRPDRATION v NONROTAEY SELF-OPENING DIE HEAD My invention relates to an improvement in non-rotary self-opening die-heads, the ob ject being to produce a superior fixture of the character, described, constructed with particular reference to fewness of parts durability in use, simplicity of operation, ease and speed of adjustment, positiveness of action, and accuracy of performance.

I With these ends in view, my invention consists in a non-rotary self-opening die-head characterized by having a mounting-member,

a chaser-carrying member, chasers mounted therein, an operating-member, a chaser-adjusting member carried thereby and pro vided with a locking-abutment inclined with respect to the transverse axis of the fixture, and a locking-member located between the chaser-carrying member and the operatingmember and co-acting with the inclined looking abutment of the said chaser-adjusting member. g My invention further consistsin a nonrotaryself-opening die-head characterized as above and having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

in the accompanyaing drawings:

Fig. 1 is a view in side elevation of my improved non-rotary self-opening die-head. shown as closed;

Fig. 2 is a view thereof in front elevation on a larger scale;

Fig. 3 is a view thereof in rear elevation;

Fig. 4 is a view thereof in vertical central longitudinal section as closed;

7 Fig. 5 is a similar view with the parts in the positions due to them when the fixture is about to open;

Fig. 6 is a corresponding view as open;

Fig. 7 is a broken longitudinal sectional view on the line 'Z7 of Fig. 2;

c Fig. 8 isja corresponding view on the line 88 of Fig. 2;

Fig. 9 is a corresponding view on the line 99 of Fig. 2; 1

Fig. 10 is a detached broken view in longitudinal section of the mounting-member;

Fig. 11 is a transverse sectional view on the line 1111 of Fig. 10;

Application filed May 18, 1928. Serial No. $38,835.

Fig. 12 is a detached view in front elevation of the adjusting-ring;

Fig. 13 is a transverse sectional view entire line 13 3 of Fig. 12;

r 14 is a detached view in front end elevation of the locking-member;

15 is a view thereof in side elevation; and V Fig. 16 is an underside view thereof;

17 is a fragmentary sectional view taken on the line 17-47 of Fig. 4.

In carrying out my invention, as herein shown, I employ a mounting-member 20, a chaser-carrying member 21, a chaser-operating member 22, a chaser-adjusting member 23 carried by the same and provided with a lockingnbutment 24 inclined with respect to the transverse axis of the fixture and form'- ing the forward wall of an inclined shallow groove 25 inits internal periphery, andla locking-member 26 having a locl'ring-rib 27 similarly inclined and co-acting with the locking-abutment aforesaid. The mountingmemb er 20 has a hollow shank 28, by meansof .At its forward end, the mounting-member 20 is provided with aconcentric bore 30 for the sliding reception of the hollow shank 31 of the chaser-carrying member 21, th forward face of which is provided arranged slots 32 receiving radially-movable chasers 33 having their inner-ends formed with cutting-teeth 34: and their outer ends provided with 'beve.s 35 for co-action with beveled notches 36 located within the forward end of the sleeve-like chaser-operating member 22, the said forward end of which has sliding bearing upon the forward end of the chaser-carrying member 21, and the rear end of which has sliding bearing upon the mounting-member '20. Each of the chasers 33 is provided, near its outer end, with a rearward ly-extending pin 37 engaged by a plunger 88 normally ur ed outward by a spring 39, the said plungers and springs being located. in radial bores 'formed in the chaser-carrying \vitl four radially.

loo

member 21 and intercommunicating with the radial slots 32 aforesaid.

At its rear end the sleevc-likc chaser-operating member 22 is internally threaded for the reception of the cxternally-threaded, tubular, forward end 41 of the chaser-adjusting member 23, which consists of a ring virtually forming a part of the said clniser-operating member and sliding upon the nounting-member 20. The said ring 22) is provided with an arcuate slot 42 for the clearance of a pin 43 projecting into it from the rear face of the chaser-operating member 22, in which the said pin is fixed by being driven thereinto. The opposite sides of this pin are respectively engaged by long adjusting-screws 44 located in tangential threaded bores 45 in the ring 23, which, by means of the said screws and pin, may be accurately set in any desired position of rotary adjustment with respect to the chaser-operating member 22 for correspondingly adjusting the cutting diameter of the chasers 33.

For preventing the relative rotation of the chaser-carrier 21 and the monnting-member 20 without interfering with their relative rectilinear movement, the mounting-member 20 is formed at its forward end with two oppositely-located slots 46 respectively receiving the squared heads 47 of two coupling-pins 48, the forward ends of which are driven into the rear face of the chaser-carrying member 21 adjacent to the shank 31 thereof.

For preventing the relative rotation of the chaser-carrying member 21 and the chaseroperating member 22 without interfering with their relative rectilinear movement, I employ two locking-pins 49 driven into and projecting forwardly from an annular bearlug-ring 50 formed within the chaser-operating member 22 and entering sockets 51 in the chaser-carrier 21, as shown in Fig. 7.

To provide for the rectilinear movement of the chaser-operating member 22 with respect to the chaser-carrying member 21 for the purpose of permitting the chasers 33 to move into their retracted positions under the normal urge of their springs 39, I employ operatingsprings 52 located diametrically opposite each other in registered bores 53 and 54 respectively formed in the said members 21 and 22, as shown in Fig. 8. Each spring 52 encircles a guide-pin 55, which is mounted in the chaser-carrying member 21 and extends rearwardly therefrom through the bore 53 thereof partway into the corresponding bore 54 in the chaser-operating member 22.

For locking the chaser-operating member 22 in its forward or chaser-closing position, as shown in Fig. 4, against the counter urge of the springs 52 just described, I employ the locking-member 26, shown in detail in Figs. 14, 15 and 16, and in conjunction with the locking-abutment 24 in the chaser-adjusting ring or member 23 constituting the salient feature of my present invention. The said locking-member is located in a substantiallyrectangular radial chamber or recess 56 produced by slotting the mounting-member 20 and specially shown in Figs. 10 and 11. The opposite walls of the said recess 56 are formed with inclined guide-grooves 57 receiving corresponding guide-ribs 58 formed upon the opposite sides of the locking-member 26.

For normally urging the said locking-member 26 into engagement with the inclined locking-abutment 24, I employ an operating spring 59 entering a deep bore 60 in the said member 26, the forward end of this spring impinging against the forward wall of the rectangular recess or slot 56.

In order to disengage the inclined forward wall of the locking-rib 27 of the lockingmember 26 from the inclined locking-abut ment 24 in the chaser-adjusting ring 23, the said locking-member is concurrently moved inwardly, as well as forwardly, by the entry of its inner end into a shallow coupling-recess 61 formed in the exterior periphery of the tubular shank 31 of the chaser-carrying member 21, as shown in Figs. 4, 5 and 6.

For re-engaging the rib 27 of the locking-member 2b with the abutment-wall 24 aforesaid, the said locking-member 26 is concurrently moved rearward and outward by the spring 59 aforesaid, whereby the chaseropcrating member 22 is locked in its chaserclosing position, as shown in Fig. 4.

The rearward and outward movements of the locking-member 26 for resetting the fixture are effected by means of a re-setting handle 62 rocking on a ball-like bearing 63 in a socket-recess 64 in the chaser-operating member 22. The inner end 65 of the ban dle 62 extends through a clearance-passage 66 in the mounting-member 20 into av socket 67 in the outer periphery of the tubular shank 31 of the chaser-carrying member 21.

For limiting the chaser-opening movement of the chaser-operating member 22 under the urge of the operating-springs 52, I employ a stop-plunger 68 mounted in a bushing 69 screwed into the said chaser-operating member and at its inner end entering an elongated recess 70 formed in the periphery of the mounting-member 20 and having at its rear end a hardened abutment-pin 71 against which the inner end of the plunger 68 impinges, the plunger being normally held in the recess 70 by a spring 72 located within the bushing 69. For the retraction of the plunger from the recess 70 to permit the chaser-operating member 22 to move into its chaser-clearance position, it is provided with a knurled button 73.

Under the described construction and arrangement of parts, it will be seen that while the mounting-member 20, the chaser-carryin g member 21, and the chasenoperating member members have relative rectilinear movement with respect to each other, as well as with respect to the mounting-member, this being one of the characteristic features of my improved non-rotary self-opening die-head.

In the use of my improved die-head, the work (represented by broken lines 74) is rotated in the usual manner, while the nonrotary die-head is bodily moved toward the work on the axial line thereof by the turret 29, or'by whatever other fixture the die head may be mounted, the die-head being at this time re-set and locked with itschasers in their cutting positions, as shown in Fig. 4. The cutting edges of the chasers 33 now engage with the work and begin the cutting operation, during which the die-head is urged toward the work with more or less pressure as required. Vhen the desired length of thread has been out in the work, the forward movement of the die-head is stopped either by an abutment on the machine or by the deliberate act of the operator. The parts of the diehead will now be in the positions as shown in Fig. 4.

The work continuing to rotate on account of being threaded into the chasers, will now pull the chaser-carrying member 21 toward it for a slight distance in a. rectilinear path away from the mounting-member 20. At the same time, the chaser-operating member 22 will be correspondingly movedinthe rectilinear path, due to the fact that at this time it is positively coupled with the chasercarrying member 21 by the locking-member 26, which lies between and engages with both members. ear movement of the said two members, the

lockin -member is bein )ositivel moved bodily inward as well as forward under the guidance of its ribs 58, so that at the termination of the concurrent rectilinear movement of the two members, the locking-member has been so far moved bodily inward that the inclined forward edge of its locking-rib 27 will be. disengaged from the inclined lockingabutment 24 of the chaser-adjusting member or ring 23, as shown in Fig. 5. At the instant the said disengagement-takes place, the operating-springs 52 assert themselves to effect the rearward rectilinear movement of the chaser-operating member 22, independently of the chaser-carrying member 21 and the mounting-member 20, until the plunger 68 strikes the hardened stop-pin 71, whereby the chaser-springs 39 are permitted to move the chasers 33 radially outward into their retracted positions and so disengage them from the work 74. The parts will now be in the positions shown in Fig. 6, with the re-setting handle 62 rearwardly inclined.

The die-head being now disengaged from the work, it is bodily retired and anew piece 1 Concurrently, with this r-ectilinof work put in place. The die-head is now reset by swinging the re-setting handle 62 from rear to front, thus effecting the rectilinear forward movement of the chaser-operating sleeve or member 22, independently of the chaser-carrying member 21 and of the mounting-member 20, whereby the lockingabutm-ent 24 of the chaser-adj usting ring 23 is moved forward and brought into line with the inclinedfo'rward edge of the locking-rib 27 of the locking-member 26. This phase of the resetting operation moves the parts from the positions shown in Fig. 6 to the positions shown in Fig. 4.

Non-',inasmuch as the tubular shank ofth-e chaser-carrying member 21 provides one of the two fulcra of the re-setting lever 62, the chaser-carrying member 21 will be urged rearward in a rectilinear path at the same time the chaser-operating member 22 is being moved forward in a rectilinear path by the handle. Therefore, at the instant the locking-abutment 24 of the chaser-adjusting ring 23 registers with the inclined forward wall of the locking-rib 27 of the locking-member 26, the chaser-carrier 21 will move slightly rearward in a rectilinear path, whereby the locking-member 26 will move outward, as well as rearward, so as to cause its lockingrib 27- tov re-engage with the locking-abutment 24 of the member or ring 23. In this ,last phase, the locking-member 26 moves from the position shown in Fig. 5 to the position shown in Fig. 4. I I I The die-head having now been re-set, advanced as before to thework and the cycle of movements above detailed repeated.

It will be understood from the foregoing that by providing the chaser-adjusting ring 23 with an inclined locking-abutment 24, the position of the chaser-operating member 22 with reference to the chasers 33 is conveniently and accurately regulated by a very slight turning of the ring in either direction by means of the adjusting-screws 44, the

turning of the ring determining what part of the abutment 24 is to co-act with the rib 27 of the locking-member 26 for holding the operating-member 22 in its chaser-closing position. Thus, if the portion A of the abutment 24, which lies nearer the front of the fixture than the portion B thereof, be turned so as to engage with the rib 27 of the dog '26, thecutting diameter of the chasers 33 will be increased, and vice versa.

I claim:

1. A non-rotary self-opening die-head, having a mounting-member, a chaser-carrying member, chasers mounted therein, a chaser-operating member, a chaser-adjusting member carried thereby with capacity for oscillatory movement with respect thereto around the axis of the die-head and formed with "a locking-abutment inclined with respect to the transverse axis of the fixture, and

a locking-member located between the chas err-operating member and the chaser-carrying member and co-acting with the said abutmentof the chaser-adjusting-member.

2. A non-rotary self-opening die head, having a mountingmember, a chaser-carrying member, chasers mounted therein, a chaser-operating member, a chaser-adjusting member carried thereby with capacity for oscillatory movement with respect thereto around the axis of the die-head and provided with a locking-abutment inclined with respect to the transverse axis of the fixture, a locking-member co-acting directly with the said abutment and interposed between the said mounting-member and the chaser-carrying member, and means for effecting the forward and inward movement of the said locking-member in an inclined path under the forward draft imposed upon it by the chasercarrying member.

3. A non-rotary self-opening die-head, having a mounting-member, a chaser-carrying member, chasers mounted therein, a chaser-operating member, a chaser-adjusting member carried thereby and provided with a locking-abutment inclined with respect to the axis of the fixture, and a spring-actuated locking-member co-acting with the said abut ment and located for inclined movement in a chamber in the mounting-member in position to be engaged for forward movement and inward movement by the chaser-carrying member, the said chaser-carrying and chaser-operating members having relative rectilinear movement with respect to each other and with respect to the mounting-memher, and the said locking-member being moved for unlocking the die-head by the for ward draft imposed upon the chasers by the work.

4. A non-rotary self-opening die-head, having a mounting-member, a chaser-carryingmember, chasers mounted therein, a chaser-operating member, a chaser-adjusting member carried thereby and provided with an abutment inclined with respect to the transverse axis of the fixture, and a lockingmember adapted to be moved in an inclined path between the mounting-member and the chaser-carrying member and provided with a rib co-acting with the inclined abutment aforesaid.

5. A non-rotary self-opening die-head, having a mounting-member, a chaser-carrying member, chasers mounted therein, a charer-operating member, a chascr-adpisting member carried thereby and provided with an abutment inclined with respect to the axis of the fixture, and a locking-member having inclined movement between the mountingmember and the chaser-carrying member and provided with a rib co-acting with the said inclined abutment and also provided with one or more guide-ribs by means of which it is guided in an inclined path.

6. A non-rotary self-opening die-head, having a mounting-member, a chaser-carrying member, chasers mounted therein, a chaser-operating member, a chaser-adjusting member carried thereby and provided with an abutment inclined with respect to the axis of the fixture, and a locking-member having a, rib adapted to co-act with the said locking-abutment and located within a slot formed in the mounting-member, one of the said parts having one or more inclined guidegrooves and the other one or more complementary guide-ribs for guiding the lockingmember in a path inclined with respect to the axis of the fixture.

7. A non-rotary self-opening die-head, having a mounting member, a chaser-carrying member, chasers mounted therein, a chaser-operatiir member, a chaser-adjusting member carried thereby and formed with an abutment inclined with respect to the axis of the fixture, and a locking-member having inclined movement in a recess formed in the mounting-member and provided with a locking-rib co-actin g with the said inclined abutment and also provided upon its opposite faces with con'iplementary inclined guideribs traveling in correspondingly-inclined grooves formed in the opposite walls of the said recess.

8. A non-rotary self-opening die-head, having a mounting-member, a chaser-carrying member, Chasers mounted therein, a chaser-operating member, a chaser-adjusting ring carried thereby and provided with a locking-abutment inclined with respect to the transverse axis of the fixture, a locking-member co-acting with the said abutment and located between the mounting-member and the chaser-carrying member for movement in an inclined path between the same, a conpling-pin and adjusting-screws engaging with the opposite faces thereof for rotating the said chaser-adjusting ring to adjust its inclined abutment with respect to the said loclsiing-member.

In testimony whereof, I have signed this specification.

EXVALD A. BARTEIT. 

